The mod_pagespeed modules are open-source server modules that optimize your site automatically.
mod_pagespeed is an open-source module written by Google that automatically optimizes web pages and resources on them. It does this by rewriting the resources using filters that implement web performance best practices. Webmasters and web developers can use mod_pagespeed to improve the performance of their web pages when serving content from the server.
mod_pagespeed provides a pre-built binary package for apache HTTP server and a module for nginx HTTP server.
mod_pagespeed includes several filter that optimize JavaScript, HTML and CSS stylesheets. It also includes filters for optimizing JPEG and PNG images. The filters are based on a set of best practices known to enhance web page performance. Webmasters who set up mod_pagespeed in addition to configuring proper caching and compression on their Apache distribution should expect to see an improvement in the loading time of the pages on their websites.
